In-place bearing staking device

ABSTRACT

An in place bearing staking device having a conventional roller staking tool and a backup tool positioned adjacent a bearing in an assembly part. An air motor driven drive unit rotates the staking tool as the tool is drawn toward the backup tool by a drive unit. A draw bar passes through the staking tool, bearing backup tool, drive unit and feed unit. The relative positions of the parts on the draw bar is determined by the particular application. Various adapters and spacers may be provided as needed.

RIGHTS OF THE GOVERNMENT

The invention described herein may be manufactured and used by or forthe Government of the United States for all governmental purposeswithout the payment of any royalty.

BACKGROUND OF THE INVENTION

This invention relates to an apparatus for staking V-groove bearings.The staking of V-groove bearings is normally accomplished in a drillpress with a roller staking tool. Bearings cannot be staked in thismanner in large assemblies such as in air vehicles.

BRIEF SUMMARY OF THE INVENTION

According to this invention, a bearing staking device is provided whichwill permit the in place staking of bearings in large assemblies. Aconventional roller staking tool is clamped to the part by means of adraw bar or other clamping means. An air motor worm drive unit rotatesthe staking tool as the staking tool is drawn toward a backup tool by afeed mechanism.

IN THE DRAWINGS

FIG. 1 is an end view of an in place bearing staking device according tothe invention.

FIG. 2 is a partially schematic sectional view of the device of FIG. 1,taken along the line 2--2.

FIG. 3 is a partially cut away view of the staking tool used in thedevice of FIGS. 1 and 2.

FIG. 4 shows another embodiment of the device shown in FIG. 2.

FIG. 5 shows a different arrangement of parts for the bearing stakingdevice of FIGS. 1-4.

DETAILED DESCRIPTION OF THE INVENTION

Reference is now made to FIGS. 1 and 2 of the drawing which show astaking device 10 for staking a bearing 12 in a large assembly part 14.

The staking device 10 has a conventional roller type staking tool 16,such as may be acquired from Rex Chainbelt Inc., a staking tool driveunit 18, a backup tool 20, a feed unit 22 and a draw bar 24. The drawbar 24 passes through the drive unit 18, the staking tool 16, thebearing 12, the backup tool 20 and engages a piston 26 in feed unit 22.

The drive unit 18 has a worm 30 which is driven by an air motor 32,shown in FIG. 1. The work 30 drives a worm gear 34, which is secured toa sleeve member 36 by means of a key or spline, not shown. The sleevemember 36 has a slot 38 for receiving a Woodruff key 40.

The shaft 42 of a conventional roller staking tool 16 is modified, asshown in FIG. 3, to provide a slot 44 for Woodruff key 40. The shaft 42also is provided with a slot 46 for receiving a snap ring 48 to retainthe staking tool 16 in the sleeve 36.

As the staking tool 16 is driven by the drive unit 18, the drive unitand staking tool is drawn toward the backup tool 20 by the feed unit 22.Compressed air is supplied to a sealed chamber 50 on one side of piston26 in the feed unit 22 through inlet 52. Movement of the piston 26provides a pull on the draw bar 24 to move the staking tool 16 towardthe backup tool 20. The portion of unit 22 on the opposite side ofpiston 51 has an opening 53 to the atmosphere. After the bearing isstaked, the apparatus can be removed from the engine part by removingnuts 54 and 56 from the draw bar after which the drive unit 18 andstaking tool 16 can be slid off of the draw bar. The feed unit 22, drawbar 24 and backup tool 20 can then be removed from the other side of thepart 14.

A hand operated feed unit 22' could be substituted for the pneumaticallyoperated unit as shown in FIG. 4. In this device, the draw bar isconnected to a rack and pinion feed mechanism 60. The rack 62 is held onthe draw bar 24 by means of nut 63. The pinion 64 is operated by meansof a feed handle 66. A torque wrench could be substituted for handle 66.

The parts need not be assembled in the manner shown in FIGS. 2 and 4,but may be assembled in other configurations depending upon theparticular application. One such arrangement is shown in FIG. 5 whereinthe feed unit is positioned next to the drive unit. In this application,an adapter 68 is connected between the drive unit 18 and the stakingtool 16. For this application, a longer draw bar than that used in thedevices of FIGS. 2 and 4 would be provided. Other arrangements of partsand adapters could be provided for particular applications.

There is thus provided a staking device which permits in place stakingof bearings in large assemblies.

I claim:
 1. An apparatus for in place staking of a bearing in anassembly part, comprising: a roller staking tool; a backup tool; meansfor holding the staking tool and backup tool adjacent opposite sides ofthe bearing to be staked; means for rotating said staking tool and meansfor drawing the staking tool toward the backup tool as the staking toolis rotated.
 2. The device as recited in claim 1 wherein said means forholding the staking tool and backup tool adjacent opposite sides of thebearing to be staked comprises a draw bar passing through the stakingtool, the bearing and the backup tool.
 3. The device as recited in claim2 wherein said means for rotating said staking tool comprises: a wormdrive assembly positioned on said draw bar and connected to said stakingtool and an air motor adapted to drive said worm drive assembly.
 4. Thedevice as recited in claim 3 wherein said means for drawing said stakingtool toward said backup tool comprises: a housing abutting said backuptool; a piston connected to said draw bar and forming a sealed chamberin said housing; means for supplying compressed air to said chamber formoving said piston to draw the staking tool toward the backup tool. 5.The device as recited in claim 3 wherein said means for drawing saidstaking tool toward said backup tool comprises: a housing abutting saidbackup tool; a rack, within said housing, connected to said draw bar; apinion, within said housing, for moving said rack; and means connectedto said pinion for rotating the pinion to thereby draw the staking tooltoward the backup tool.